std::thread::hardware_concurrency

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Thread support library
Threads thread (C++11) this_thread namespace get_id (C++11) yield (C++11) sleep_for (C++11) sleep_until (C++11) Mutual exclusion mutex (C++11) timed_mutex (C++11) recursive_mutex (C++11) recursive_timed_mutex (C++11) Generic lock management lock_guard (C++11) unique_lock (C++11) defer_lock_t try_to_lock_t adopt_lock_t (C++11) (C++11) (C++11) lock (C++11) try_lock (C++11) defer_lock try_to_lock adopt_lock (C++11) (C++11) (C++11) Condition variables condition_variable (C++11) condition_variable_any (C++11) notify_all_at_thread_exit (C++11) cv_status (C++11) Futures promise (C++11) packaged_task (C++11) future (C++11) shared_future (C++11) async (C++11)
std::thread
Member classes thread::id Member functions thread::thread thread::~thread thread::operator= Observers thread::joinable thread::get_id thread::native_handle thread::hardware_concurrency Operations thread::join thread::detach thread::swap Non-member functions std::swap

static unsigned hardware_concurrency();		(since C++11)

Returns number of concurrent threads supported by the implementation. The value should be considered only a hint.

Contents 1 Parameters 2 Return value 3 Exceptions 4 Example

[edit] Parameters

(none)

[edit] Return value

number of concurrent threads supported. If the value is not well defined or not computable, returns ​0​.

[edit] Exceptions

[edit] Example

This section is incomplete